Circularly polarized light induces an octupolar inverse Faraday effect and anisotropic multipolar exchange in 4d2/5d2 Mott insulators, opening a nonequilibrium phase space with tunable antiferro-octupolar, ferro-octupolar, and multipolar liquid states.
In partic- ular, the FM structure separates this region from both the PPFQ and ML regimes, while the dominant Γ-point response remains in the ferro-octupolar channel
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Light-driven octupolar inverse Faraday effect and multipolar order in Mott insulators
Circularly polarized light induces an octupolar inverse Faraday effect and anisotropic multipolar exchange in 4d2/5d2 Mott insulators, opening a nonequilibrium phase space with tunable antiferro-octupolar, ferro-octupolar, and multipolar liquid states.